She stops fighting in launderette (6)
I believe the answer is:
washer
'launderette' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'she stops fighting' is the wordplay.
'stops' means one lot of letters goes inside another (stopping can mean blocking a gap).
'fighting' becomes 'war'.
'she' put within 'war' is 'WASHER'.
'in' is the link.
Can you help me to learn more?
(Other definitions for washer that I've seen before include "Ring placed between two surfaces to prevent leakage, as in tap" , "Rubber ring securing joint" , "Seal preventing leakage" , "Leak-stopping ring" , "Cleaner" .)